Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Yellow card with extensive red staining. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

Card with ballpoint pen illustration. One side reads "We Are With You" with zigzag decorations in corners. Reverse reads, "Don't worry. You are not by yourself. We will support you!" with illustration of hand reaching out.

Card made by a student from the George Washington University Hillel. Contents of card rendered illegible by water damage at the memorial site.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration a heart with geometric and floral motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Drawing in colored pencil on paper. Signed: "Rhea" lower center on the front; illustrated above with four-legged animal, perhaps a dog. Additional colored illustrations appear on the back. Extensive tearing and creasing due to exposure to the elements at the Wilkins memorial; the drawing is now torn into two pieces.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Friends, The loss you feel must be beyond my comprehension. I am so very sorry for your tragedy. My prayer is that God will somehow us this to make his face known. I also pray that you will experience emotional and physical healing. These events have reminded me of the frail nature of our earthly bodies. I am confident that God has prepared a plan for us all where we will be freed from our own flesh and all pain will be gone. Love, Blake."

Typed note from the members and friends of First Presbyterian Church in Jamestown, Ny. The text of Psalm 23 appears below. Extensive staining due to exposure to the elements at the Wilkins memorial.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a leaf with geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Typed memorial note in honor of Joyce Fienberg. The author recalls personal details about Joyce's research career at the University of Pittsburgh and her caring personality.

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside conveys the sender's horror regarding the October 27 attack and their prayers that God grant peace and comfort. The church's contact information is included on the back of the envelope.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To Tree of Life Synagogue members, My prayers are with you in Pittsburgh. I know I do not begin to know the pain and grief that is so raw for each of you- but God knows and cares. May you feel the love and concern and care of our church in San Diego. In Him, Rita [last name redacted]."

Floral tag from floral arrangement sent by John [last name redacted]. The tag reads: "For the innocents who[se] lives were taken- Eternal Love." It is signed John [last name and address redacted] of Phillipsburg, North Carolina. The contact information for James Flower and Gift Shoppe is included below. The message is written in black ink on a printed tag with an ombre background resembling a sunset.

Business card from Reverend John Shaver of San Dieguito Methodist Church in Encinitas, Ca.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside contains messages of condolence and love. The church's contact information is included on the back of the envelope.

Rectangular card from a student at Fountain Valley School in Colorado Springs, Co. The card reads: "Dear members of Tree of Life synagogue, I'm from Vietnam and I stand with you. I'm sorry for your loss. May peace be with you. Shalom [signature]." Illustrated with Vietnamese flag, peace sign, and Star of David.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The front and back covers of the card contain illustrated Stars of David. The inside reads: "One God... One Love... One World. I am sorry for your pain and suffering. May God Bless you all. Howard E. [last name redacted]." A Star of David appears in the upper center.